| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.iceberg.spark; |
| |
| import java.util.List; |
| import org.apache.iceberg.Schema; |
| import org.apache.iceberg.relocated.com.google.common.collect.Lists; |
| import org.apache.iceberg.types.Types; |
| import org.apache.spark.sql.catalyst.expressions.Attribute; |
| import org.apache.spark.sql.catalyst.expressions.AttributeReference; |
| import org.apache.spark.sql.catalyst.expressions.Expression; |
| import org.apache.spark.sql.catalyst.expressions.UnsafeProjection; |
| import org.apache.spark.sql.types.StructType; |
| import scala.collection.JavaConverters; |
| |
| public class SparkBenchmarkUtil { |
| |
| private SparkBenchmarkUtil() { |
| } |
| |
| public static UnsafeProjection projection(Schema expectedSchema, Schema actualSchema) { |
| StructType struct = SparkSchemaUtil.convert(actualSchema); |
| |
| List<AttributeReference> refs = JavaConverters.seqAsJavaListConverter(struct.toAttributes()).asJava(); |
| List<Attribute> attrs = Lists.newArrayListWithExpectedSize(struct.fields().length); |
| List<Expression> exprs = Lists.newArrayListWithExpectedSize(struct.fields().length); |
| |
| for (AttributeReference ref : refs) { |
| attrs.add(ref.toAttribute()); |
| } |
| |
| for (Types.NestedField field : expectedSchema.columns()) { |
| int indexInIterSchema = struct.fieldIndex(field.name()); |
| exprs.add(refs.get(indexInIterSchema)); |
| } |
| |
| return UnsafeProjection.create( |
| JavaConverters.asScalaBufferConverter(exprs).asScala().toSeq(), |
| JavaConverters.asScalaBufferConverter(attrs).asScala().toSeq()); |
| } |
| } |